was thinking about running the GSM true dual 2.5 exhaust side exit system BUT using the street rod boom tubes on the side instead of the pipes that come with the kit. does anyone have any experience with these? these are for sale at spintechmufflers.com under accessories. These are the ones used on nascar i believe. the one i was planning on getting is the one with dual 2.5 inlets. if anyone has any feedback i would greatly appreciate it.